Detachable valve assembly and water meter

Abstract

The detachable valve assembly is used for being installed in a pipeline and comprises a valve body, a first sealing piece, a valve element, a cover plate and a second sealing piece, the side wall and the lower end of the valve body are provided with working faces, a valve cavity is formed in the valve body, and water openings are formed in the two sides of the valve cavity. The two water ports are respectively positioned on two sides of the working surface and are respectively used as a water inlet and a water outlet; the first sealing element is mounted on the working surface; the valve core is rotationally mounted in the valve cavity; the cover plate is mounted at the top of the valve body and is used for fixing the valve body on a pipeline; the second sealing piece is installed at the bottom of the cover plate and can make contact with the side wall of the pipeline to achieve sealing. The valve body is formed by splicing valve blocks, and the valve element can be installed in the valve body. The detachable valve assembly and the water meter are compact in structure, low in manufacturing cost, convenient and labor-saving to assemble, long in service life and low in use and maintenance cost, and the overall structural strength of a pipeline is greatly improved.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a detachable valve component and a water meter. Background Art

[0002] In the existing valve-controlled water meters, the flow of the water meter is controlled by the valve core and its components. The existing valve components are mostly assembled on the water meter body in the form of parts, and then the water meter case body and the pipe section are fixed for a second time in the form of joints. The joint fixing part must withstand the shear force of the water meter pipe section and the water meter body, and the water pressure of the water network. As a result, the joint often breaks, and after damage, the entire joint needs to be removed, and replacement is very cumbersome.

[0003] The material of the existing valve-controlled water meter case assembly where the ball valve is installed is mostly copper, stainless steel or plastic and other materials that are not easy to rust. The cost of the above metals is relatively high, and the metal surface is easy to absorb calcium and magnesium ions that are more common in water to form scale, which is easy to affect the torque of the valve and even damage the valve body. In addition, the strength of the plastic case assembly is not high. Therefore, a new valve-controlled water meter case assembly is needed, so that the case and the pipe section are a complete whole to increase the strength, and the inner and outer surfaces of the case can be sprayed with paint, which can resist corrosion, use low-cost cast iron materials, and can reduce the accumulation of scale on the surface of the case after being coated. Utility Model Content

[0004] Technical issues to be solved

[0005] The technical problem to be solved by the utility model is to provide a detachable valve assembly and a water meter which are compact in structure, easy to install and maintain, can greatly improve the structural strength of the water meter and reduce the manufacturing and maintenance costs.

[0006] Technical solutions to the problem

[0007] The utility model provides a detachable valve assembly, which is used to be installed in a pipeline and to control the flow of a flow channel in the pipeline, and comprises:

[0008] The valve body 4 is used as a fixing and mounting carrier. The side wall and the lower end of the valve body 4 are provided with a working surface. A valve cavity is formed in the valve body 4. Water inlets 40 are provided on both sides of the valve cavity. The two water inlets 40 are respectively located on both sides of the working surface and serve as a water inlet and a water outlet respectively.

[0009] A first sealing member 5 is mounted on the working surface and can fit against the inner wall of the flow channel and achieve sealing;

[0010] A valve core is rotatably mounted in the valve cavity and is used to control the amount of communication between the water inlet and the water outlet;

[0011] A cover plate 1 is installed on the top of the valve body 4 and is used to fix the valve body 4 on the pipeline. The cover plate 1 is provided with an axial hole 10 through which the valve stem 2 of the valve core can pass;

[0012] The valve body 4 is formed by splicing valve blocks and can accommodate the valve core to be installed in the valve body.

[0013] Furthermore, the working surface and the first sealing member 5 are U-shaped.

[0014] Furthermore, a sealing installation groove 402 for installing the first sealing member 5 is formed on the working surface.

[0015] Furthermore, a groove is provided on the side wall of the water inlet end of the valve body 4 to form a sedimentation groove 401, and the sedimentation groove 401 is located at the lower end of the water inlet.

[0016] Furthermore, the cross section of the valve body 4 is circular.

[0017] Furthermore, a pressing portion for pressing the valve body 4 and a limiting portion for radially limiting the valve body 4 are provided at the lower end of the cover plate 1 .

[0018] Furthermore, a boss 11 is provided at the center of the upper surface and / or lower surface of the cover plate 1, and a through hole is penetrated through the end face of the boss 11 to form the axial hole 10. The lower end of the boss 11 forms a first clamping surface and can contact the step surface of the side wall of the valve stem 2 and axially limit it.

[0019] Furthermore, the lower surface of the cover plate 1 is provided with an annular protrusion 12 coaxial with the axial hole 10, and the lower end of the annular protrusion 12 forms a second clamping surface that can contact and clamp the top of the valve body 4, and the outer wall of the annular protrusion 12 forms a sealing installation surface for installing the second sealing member 3.

[0020] Furthermore, the second sealing member 3 includes a first sealing portion 31 that can be sleeved outside the annular protrusion 12, the end of the first sealing portion 31 extends radially outward to form a second sealing portion 32 that can fit the lower bottom surface of the cover plate 1, and the end of the second sealing portion 32 is bent downward to form a third sealing portion 33 that can be inserted into the annular groove of the side wall of the pipeline.

[0021] Furthermore, one or more annular protrusions are coaxially arranged on the top surface of the second sealing portion 32 to form a sealing lip.

[0022] Furthermore, a plurality of first positioning protrusions 403 are provided on the top of the valve body 4 , and a positioning groove 13 capable of accommodating the first positioning protrusions 403 to be inserted and realizing radial limiting is provided on the bottom surface of the cover plate 1 .

[0023] Furthermore, there are at least two first positioning protrusions 403 which are evenly distributed around the circumference.

[0024] Furthermore, the valve stem 2 includes a valve stem body 201, the side wall of the valve stem body 201 is provided with an annular groove for installing a sealing ring, the top of the valve stem body 201 is provided with a driving portion 202 extending to the outside of the cover plate 1 and used to drive the valve stem body 201 to rotate, and the root of the driving portion 202 is provided with a retaining ring groove for installing a retaining ring 21; the lower end of the valve stem body 201 extends radially outward and forms an annular limiting portion 203 for contacting the end of the shaft hole 10 and realizing axial limiting, and the lower end of the valve stem body 201 is provided with a toggle portion 204 for connecting with the valve core and for toggling it to rotate.

[0025] Furthermore, a water groove is provided on the side wall of the valve body 4 or the first sealing member 5, and the water groove is used to allow a small amount of domestic water to flow through when the valve core is closed.

[0026] Furthermore, the flow rate of the water tank when the valve core is closed is 10L-20L / h.

[0027] Furthermore, the valve core is a ball valve 61 or a butterfly valve 62 .

[0028] Furthermore, when the valve core is a ball valve, an annular valve seat 7 is provided in the valve cavity to contact the side wall of the ball valve 61 and enable it to rotate. There are two valve seats 7, which are respectively located on the two valve blocks.

[0029] Furthermore, the valve body 4 is formed by splicing two valve blocks which are arranged left and right, front and back, or top and bottom.

[0030] Furthermore, the fitting surfaces of the two valve blocks pass through the center of the valve cavity.

[0031] Furthermore, the two valve blocks are provided with mounting holes through which bolts can pass to achieve fixed connection.

[0032] Furthermore, a positioning component is provided between the contact surfaces of the two valve blocks.

[0033] Furthermore, the positioning component is a second positioning protrusion 411 and a second positioning groove 412 into which the second positioning protrusion 411 can be inserted.

[0034] Furthermore, when the valve blocks are arranged front to back or left to right, the two valve blocks have the same structure and are arranged in a centrally symmetrical manner.

[0035] Meanwhile, the utility model also provides a water meter, which uses the above-mentioned detachable valve assembly.

[0036] Furthermore, the water meter is a vertical water meter.

[0037] Furthermore, the water meter includes a case 83 and an inlet pipe 82 and an outlet pipe 84 arranged on the side wall of the case 83, and the ends of the inlet pipe 82 and the outlet pipe 84 are provided with a vertical connecting pipe 81, and the vertical connecting pipe 81 is provided with an inlet channel 811 and an outlet channel 812 that are not connected to each other, the inlet channel 811 is connected to the inlet pipe 82, and the outlet channel 812 is connected to the outlet pipe 84; the side wall of the inlet pipe 82 or the outlet pipe 84 is provided with a mounting table 84a, and the mounting table 84a is provided with a valve hole 840 that connects the flow channel in the pipe and can accommodate the axial insertion of the valve body, and the edge of the mounting table 84a is provided with a mounting hole for fixing the cover plate 1.

[0038] Furthermore, the valve hole is a circular hole.

[0039] Furthermore, a sealing ring installation groove 841 for installing the second sealing member 3 is provided on the installation table 84a.

[0040] Furthermore, the watch case 83, the water inlet pipe 82, the water outlet pipe 84 and the vertical connecting pipe 81 are integrally formed by casting.

[0041] Furthermore, the water inlet pipe 82 and the water outlet pipe 84 are parallel to each other and their side walls are connected to each other.

[0042] Furthermore, a sedimentation cavity 832 is provided between the water inlet end of the valve body 4 and the inner wall of the pipeline, and the sedimentation cavity 832 is located directly below the water inlet end of the valve body 4 .

[0043] Beneficial Effects

[0044] The detachable valve assembly of the utility model adopts a split splicing structure, which has low manufacturing cost and convenient assembly, can realize pre-installation of the valve, can be installed from the side wall of the pipeline, does not need to disassemble the pipe section, and has a simple assembly process, which greatly reduces the manufacturing, use and maintenance costs and has a wide range of applications; the valve body is spliced ​​by valve blocks, with high manufacturing precision, which is convenient for disassembly and assembly of the valve core, and reduces the production, assembly and maintenance costs; the valve block adopts up and down, left and right, and front and back settings, which can be configured according to different usage requirements, has strong adaptability and a wide range of applications; the sealing structure is optimized and designed, which is convenient to assemble and has good sealing performance; the water meter of the utility model adopts a detachable valve assembly, so that the meter case and the pipe section form an integral structure without a connection structure, which increases the overall strength of the shell assembly, avoids the risk of breakage or leakage at the joint, and at the same time When the valve body is assembled, the coating can be sprayed on the inner and outer surfaces of the case to improve corrosion resistance, and the case material can be made of low-cost, high-strength cast iron, which expands the limitation that the case or pipe section for assembling valve parts can only be made of high-cost copper, stainless steel or low-strength plastic. The coating can also reduce the accumulation of scale on the inner surface of the case, avoid the risk of valve jamming, and improve the overall reliability and stability of use. The valve assembly can be pre-assembled and then assembled with other parts to form a case assembly, which greatly improves the original complex assembly process, reduces production costs, and improves production efficiency. The detachable valve assembly and water meter of the utility model have a compact structure, low manufacturing cost, convenient and labor-saving assembly, greatly improve the overall structural strength of the pipeline, long service life, and low use and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the structure of the detachable valve assembly of the utility model;

[0046] Figure 2 This is a schematic structural diagram of the detachable valve assembly of the utility model from another angle;

[0047] Figure 3 It is a schematic diagram of the exploded structure of the detachable valve assembly of the utility model;

[0048] Figure 4 It is a cross-sectional view of the detachable valve assembly of the utility model;

[0049] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0050] Figure 6 It is a structural schematic diagram of the valve body of the detachable valve assembly of the utility model;

[0051] Figure 7 It is a schematic diagram of the exploded structure of the first embodiment of the valve body of the detachable valve assembly of the utility model;

[0052] Figure 8It is a structural schematic diagram of the cover plate of the detachable valve assembly of the utility model;

[0053] Fig. 9 It is a structural schematic diagram of the first embodiment of the valve block of the detachable valve assembly of the utility model;

[0054] Fig.10 This is a structural schematic diagram of a second embodiment of the detachable valve assembly of the utility model;

[0055] Fig.11 This is a schematic diagram of the exploded structure of the second embodiment of the detachable valve assembly of the utility model;

[0056] Fig.12 This is a structural schematic diagram of the third embodiment of the detachable valve assembly of the utility model;

[0057] Fig.13 This is a schematic diagram of the exploded structure of the third embodiment of the detachable valve assembly of the utility model;

[0058] Fig.14 This is a structural schematic diagram of a fourth embodiment of the detachable valve assembly of the utility model;

[0059] Fig.15 It is a schematic diagram of the exploded structure of the fourth embodiment of the detachable valve assembly of the utility model;

[0060] Fig.16 It is a cross-sectional view of the fourth embodiment of the detachable valve assembly of the utility model;

[0061] Fig.17 It is a structural schematic diagram of the water meter of the utility model;

[0062] Fig.18 This is a schematic diagram of the installation of the valve assembly of the water meter of the utility model;

[0063] Fig.19 It is a cross-sectional view of the water meter of the utility model;

[0064] Fig. 20 for Fig.19 Enlarged view of middle part B;

[0065] Fig.21 for Fig.19 Enlarged view of part C in the middle. DETAILED DESCRIPTION

[0066] The following is a detailed description of the embodiments of the present utility model in conjunction with the accompanying drawings.

[0067] See also Figure 1-Figure 16The utility model provides a detachable valve assembly, which can be pre-assembled and then installed in a pipeline, and the flow of the flow channel in the pipeline can be controlled to achieve opening, closing and flow adjustment, which includes a valve body 4, a valve core and a cover plate 1.

[0068] The valve body 4 is used as a fixing and mounting carrier for fixing (axially inserting) to the side wall of the pipeline. The side wall and the lower end of the valve body 4 are provided with a working surface. In the present application, one end of the valve body located in the pipeline is the lower end, and the other end is the top end. The working surface is U-shaped, which can basically fit the inner wall of the pipeline. On the working surface, a first sealing member 5 is provided. The first sealing member 5 can fit the inner wall of the flow channel to achieve sealing, so that the valve body blocks the flow channel and the two sides of the valve body are not connected. The top surface of the valve body 4 is a plane; a valve cavity is formed in the valve body 4, and water ports 40 are opened on both sides of the valve cavity. The two water ports 40 are respectively located on both sides of the working surface (the first sealing member 5) and serve as a water inlet and a water outlet respectively; the valve core is rotatably installed in the valve cavity, which is used to control the amount of communication between the water inlet and the water outlet, and to adjust the communication, blocking and size between the water inlet and the water outlet. A valve stem 2 is provided on the top of the valve core to control the rotation of the valve core. A hole body is penetrated through the top of the valve cavity to allow the valve stem to pass through.

[0069] The cover plate 1 is used to be installed on the top of the valve body 4, and then the valve body 4 is fixed on the pipeline. A mounting hole 102 is provided on the edge of the cover plate 1, which is used to be fixedly connected to the side wall of the pipeline (mounting table) by bolts, so as to realize the connection between the valve assembly and the pipeline. An axial hole 10 is opened in the center of the cover plate 1, which can accommodate the valve stem 2 to pass through, and then used to realize the rotation adjustment of the valve core; a clamping part and a limiting part are provided at the lower end of the cover plate 1, wherein the clamping part is used to axially clamp the valve body 4 so that the valve body 4 is fully inserted into the pipeline and the first sealing member 5 is in contact with the inner wall of the pipeline to achieve reliable sealing, and the limiting part is used to radially limit the valve body to ensure that the water inlet and the first sealing member are located at the correct position to avoid deflection affecting the sealing of the first sealing member and the inner wall of the pipeline.

[0070] In the present application, the valve body 4 is formed by splicing at least two valve blocks, which can accommodate a valve core installed in the valve body to form a complete valve structure.

[0071] In this embodiment, the valve body 4 is cylindrical, that is, its cross-section is circular, and the bottom of the valve body 4 is hemispherical, and its radius is basically the same as the radius of the inner wall of the flow channel, forming an overall U-shaped working surface, so that the working surface is parallel to or fits the inner wall of the pipeline. In the actual production process, there is a small gap between the working surface and the inner wall of the pipeline to facilitate overall assembly. The gap is compensated by the first seal, and a seal installation groove 402 is opened on the working surface. The seal installation groove 402 is an overall U-shaped structure, and the plane where it is located is perpendicular to the axis of the flow channel. The first seal 5 is strip-shaped and is installed in the seal installation groove 402, which is used to fit the inner wall of the pipeline to achieve sealing; a plurality of strip grooves are opened on the sealing surface of the first seal along the length direction, and the strip grooves divide the sealing surface into a plurality of sealing lips, which are used to contact the inner wall of the pipe body to achieve sealing, and the sealing performance is good.

[0072] A boss 11 is provided on the upper surface or the lower surface of the cover plate 1, or at the center of both the upper surface and the lower surface of the cover plate 1. The boss 11 is cylindrical, and a through hole is penetrated through the end face of the boss 11 to form an axial hole 10, which is used to increase the axial length of the axial hole 10 and increase the contact area between the axial hole 10 and the valve stem 2, thereby improving the installation reliability and stability of the valve stem, avoiding deflection, and improving the stable control of the valve core; the lower end of the boss 11 forms a first clamping surface, and at the same time, an upward step surface is provided on the side wall of the valve stem 2, and the first clamping surface can contact the step surface, thereby realizing axial limitation of the valve stem 2. After the valve stem 2 passes through the axial hole from bottom to top, it is fixed by a retaining spring.

[0073] At the same time, an annular protrusion 12 is provided on the lower surface of the cover plate 1, and the annular protrusion 12 is coaxial with the axial hole 10. The lower end of the annular protrusion 12 forms a second pressing surface, and the second pressing surface can contact the top of the valve body 4, and then during assembly, it is used to press the valve body downward. The outer wall of the annular protrusion 12 forms a sealing installation surface for installing the second sealing member 3. The second sealing member 3 is a circular ring as a whole, and is used to achieve sealing between the cover plate 1 and the mounting surface of the pipeline side wall.

[0074] The second sealing member 3 includes a first annular sealing portion 31, which can be sleeved outside the annular protrusion 12. The end of the first sealing portion 31 (close to one end of the cover plate) extends radially outward to form a second sealing portion 32, which can be fitted to the lower bottom surface of the cover plate 1. In order to improve the sealing effect, one or more annular protrusions are provided on the top surface of the second sealing portion 32, and the annular protrusions form a sealing lip, that is, there are one or more sealing lips, which are coaxial with the cover plate to form a multi-pass seal with good sealing performance; the end (edge) of the second sealing portion 32 is bent downward by 90 degrees to form a third sealing portion 33, and the axial height (in the direction of the axis of the cover plate) of the third sealing portion 33 is less than the axial height of the first sealing portion 31, and it can be inserted into the annular groove on the side wall of the pipeline (on the mounting table), thereby realizing end face sealing.

[0075] A plurality of first positioning protrusions 403 are provided on the top of the valve body 4. The first positioning protrusions 403 are cylindrical, there are at least two of them, and they are evenly distributed around the axis of the valve body 4. At the same time, a positioning groove 13 corresponding to the first positioning protrusions 403 and capable of accommodating their insertion is provided on the bottom surface of the cover plate 1. The positioning groove 13 is located in the annular protrusion 12, that is, in the second sealing member 3, and is used for radially positioning the valve body 4 during assembly to improve assembly accuracy; the end of the first positioning protrusion 403 is provided with a chamfer or a fillet, which can achieve fast and accurate insertion and improve assembly efficiency.

[0076] In the present application, the valve stem 2 and the valve core are separately arranged, that is, the valve stem 2 and the valve core are two independent parts, which can reduce the production cost, facilitate assembly and disassembly, and improve the use and maintenance cost; for details, refer to Figure 5 The valve stem 2 includes a valve stem body 201. The outer diameter of the valve stem body 201 is substantially the same as the inner diameter of the shaft hole. The valve stem body 201 can be rotatably mounted in the shaft hole. An annular groove is provided on the side wall of the valve stem body 201. The annular groove is one or more. The annular groove is used to install a sealing ring to achieve sealing between the valve stem 2 and the cover plate (shaft hole). At the same time, the sealing ring plays a damping role in movement. A driving part 202 is provided on the top of the valve stem body 201. The driving part 202 is a rod body, which is coaxial with the valve stem body 201 and has a non-circular cross section. It is used to apply a radial force to the driving part to achieve rotation. The cross section of the driving part can be a rectangle or a regular polygon, or other non-circular shapes. In order to facilitate processing, a rectangular structure is adopted in this embodiment. The driving part 202 extends to the outside of the cover plate 1 as The input end of the torque is used to drive the valve stem body 201 to rotate; a retaining ring groove is opened at the root of the driving part 202, and the retaining ring groove is used to install the retaining ring 21 to achieve axial fixation of the valve stem 2; the lower end of the valve stem body 201 extends radially outward to form an annular limiting portion 203, and the top surface of the annular limiting portion 203 forms a step surface, which is used to contact the end of the shaft hole 10 (the first clamping surface) to achieve axial limitation. Through the above-mentioned retaining ring and step surface, the axial installation and fixation of the valve stem can be achieved; a toggle portion 204 is provided at the lower end of the valve stem body 201, and the toggle portion 204 is coaxial with the valve stem body 201, and is a non-circular protrusion or groove. In this embodiment, its cross-section is rectangular, which is used to connect with another connecting portion on the top of the valve core, thereby achieving radial limitation and used to toggle the valve core to rotate.

[0077] The above-mentioned valve core is a ball valve 61 or a butterfly valve 62. When it is a ball valve, a non-circular groove is provided on the top of the ball valve, preferably a rectangular groove, and the toggle part can be axially inserted into the groove and can toggle the ball valve to rotate; when it is a butterfly valve, a protrusion with a rectangular cross-section is provided on the top of the butterfly valve, and the toggle part 204 is a groove structure that can accommodate the protrusion to be inserted, which reduces the production difficulty and manufacturing cost and is easy to assemble.

[0078] When the valve core is a ball valve, flow channel holes 610 are passed through both ends of the ball valve 61, and two stepped holes are provided in the valve cavity. The stepped holes are coaxial with the water inlet, and a valve seat is installed in the stepped holes. The valve seat 7 is annular and has an arc-shaped working surface, which can contact the spherical side wall of the ball valve 61, thereby enabling the ball valve 61 to rotate. There are two valve seats 7, which are respectively located on two valve blocks. They are easy to manufacture and assemble, and have low production costs. A sealing ring is provided between the valve seat 7 and the stepped hole to achieve sealing between the valve seat and the valve body.

[0079] In the present application, the valve body 4 is composed of two valve blocks spliced ​​together, which can be set left and right, front and back, or up and down, and the fitting surfaces (planes) of the two valve blocks pass through the center of the valve cavity, that is, sub-valve cavities are opened on the two valve blocks, and the two sub-valve cavities form a complete valve cavity, which is convenient for the installation of the valve core; at the same time, mounting holes are opened on the two valve blocks, which can allow bolts to pass through and realize the fixed connection between the two valve blocks, which can make the valve body form a whole, realize pre-assembly, will not scatter, and facilitate the subsequent assembly operation; in order to improve the assembly efficiency and accuracy, a positioning component is provided between the contact surfaces of the two valve blocks, and the positioning component is a second positioning protrusion (pin) 411 and a second positioning groove (pin hole) 412, and the second positioning groove 412 can accommodate the second positioning protrusion 411 on the other valve block to be inserted, so as to realize quick assembly.

[0080] In the present application, when the valve blocks are arranged front to back or left to right, the two valve blocks have the same structure and are arranged centrally symmetrically, which can reduce production costs and only requires one mold to realize the processing and production of the two valve blocks.

[0081] The valve assembly of the present application is mainly used for water meters, which are smart water meters. When the user is in arrears or defaults on water bills, the water meter will be closed. In order to ensure the user's basic drinking water, a water flow groove can be opened on the side wall of the valve body 4 or the first sealing member 5. The water flow groove is used to allow a small amount of water to flow through when the valve core is closed, which serves as the user's daily water. In this embodiment, the flow rate of the water flow groove when the valve core is closed is 10L-20L / h, that is, when the valve core is closed, the amount of water passing through the water flow groove per hour is 10L-20L, so as to ensure the user's basic daily water.

[0082] A groove is provided on the side wall of the water inlet end of the valve body 4 to form a sedimentation groove 401. The sedimentation groove 401 is located at the lower end of the water inlet. It can make impurities in the water be deposited in the sedimentation groove 401 to avoid passing through the valve core and entering the user's water channel. It has a certain purification function. At the same time, it protects the valve assembly, prolongs its service life, and ensures the reliability and stability of the valve assembly.

[0083] The following are instructions based on different settings of the valve block:

[0084] For ease of explanation, the water inlet direction is the front, the water outlet direction is the rear, the cover plate direction is the top, and the direction facing away from the cover plate is the bottom.

[0085] Example 1, see Figure 4-Figure 9 The valve body 4 is formed by splicing two valve blocks arranged in front and back. In this embodiment, it is defined as the first valve block 41. Its parting surface (the contact surface of the two valve blocks) is perpendicular to the connection line of the water inlet and the water outlet. The valve cavity is formed by splicing two sub-chambers in front and back. The water inlets are respectively opened on the two first valve blocks 41. A positioning component is provided on the parting surface of the first valve block 41. The positioning component includes a second positioning protrusion 411 and a second positioning groove 412, which are both cylindrical. The second positioning protrusion 411 and the second positioning groove 412 are formed by the first valve block. The vertical plane of 41 is symmetrically arranged, so the structures of the two first valve blocks 41 are exactly the same, which can greatly reduce the production cost. During assembly, one of the first valve blocks only needs to be rotated 180 degrees and then fitted into the other first valve block. In order to facilitate assembly and prevent the valve body from falling off, a pre-assembly is formed, thereby improving assembly efficiency. Two mounting holes are symmetrically provided on the first valve block, which can be fixed by bolts. The mounting holes on the side walls of the valve body are countersunk holes to avoid exposure of the bolts and affect assembly. In this embodiment, the valve core is a ball valve 61.

[0086] Example 2, see Figure 10-11 In this embodiment, the valve body is formed by splicing an upper valve body 42a and a lower valve body 42b which are arranged up and down. The parting surface is perpendicular to the axis of the valve body 4. The valve cavity, the water inlet and the water outlet are all spliced ​​by the upper and lower parts. The parting surface is provided with protrusions and grooves for positioning. The valve core in this embodiment is a ball valve.

[0087] Example 3, see Figure 12-13 In this embodiment, the valve body 4 is formed by splicing two valve blocks arranged on the left and right, which is defined as the third valve block 43 in this embodiment, and its parting surface is parallel to the connecting line of the water inlet and the water outlet. The valve cavity, the water inlet and the water outlet are all spliced ​​by the left and right parts. The parting surface is provided with protrusions and grooves for positioning. In order to reduce production costs, the structures of the two third valve blocks 43 are exactly the same. At the same time, the valve core in this embodiment is a ball valve.

[0088] Example 4, see Figure 14-16 The difference between the embodiment 1 and the embodiment 1 is that the valve core is a butterfly valve 62, and a convex shaft 621 is provided at the lower end of the butterfly valve, which is coaxial with the valve stem. At the same time, a hole is opened at the bottom of the valve cavity, which can accommodate the convex shaft to be inserted as a rotary support.

[0089] Embodiment 5 is different from Embodiment 2 in that its valve core is a butterfly valve 62, and a convex shaft 621 is provided at the lower end of the butterfly valve, which is coaxial with the valve stem. At the same time, a hole is opened at the bottom of the valve cavity, which can accommodate the convex shaft to be inserted as a rotary support.

[0090] Embodiment 6 is different from Embodiment 3 in that its valve core is a butterfly valve 62, and a convex shaft 621 is provided at the lower end of the butterfly valve, which is coaxial with the valve stem. At the same time, a hole is opened at the bottom of the valve cavity, which can accommodate the convex shaft to be inserted as a rotary support.

[0091] At the same time, the utility model also provides a water meter, see Figure 17-Figure 21, which uses the above-mentioned detachable valve assembly. In the present application, the water meter is a vertical water meter. Specifically, the water meter includes a case 83, and the case 83 is used to install a flow meter. An inlet pipe 82 and an outlet pipe 84 are provided on the side wall of the case 83. The inlet pipe 82 and the outlet pipe 84 are arranged in parallel up and down and are located on the same side of the case 83. In the present embodiment, the inlet pipe 82 is arranged at the lower end, and the outlet pipe is arranged at the upper end. The side walls of the inlet pipe 82 and the outlet pipe 84 are connected to each other, which can improve the overall structural strength and facilitate (casting) manufacturing. A vertical connecting pipe 81 is provided at the end of the inlet pipe 82 and the outlet pipe 84. The vertical connecting pipe 81 is perpendicular to the inlet pipe and the outlet pipe. The pipe is used to connect the water meter as a whole to the tap water pipeline. An inlet flow channel 811 and an outlet flow channel 812 are provided in the vertical pipe 81. The inlet flow channel 811 and the outlet flow channel 812 are arranged up and down and are not connected to each other. Specifically, the inlet flow channel is arranged at the lower end, which is connected to the inlet pipe 82, and the outlet flow channel is arranged at the upper end, which is connected to the outlet pipe 84; a mounting table 84a is provided on the side wall of the inlet pipe 82 or the outlet pipe 84. Since the outlet pipe is located at the upper end in this embodiment, the mounting table 84a is arranged on the top of the side wall of the outlet pipe 84 for ease of operation. The top surface of the mounting table 84a is used as a mounting surface, and the axis of the mounting surface is perpendicular to and intersects with the axis of the outlet pipe. A valve hole 840 is opened on the mounting table 84a, and the valve body is installed in the valve hole. The valve hole 840 is a circular hole, and its cross section is the same shape and size as the cross section of the valve body, which can just accommodate the axial insertion of the valve body. In order to facilitate assembly, the diameter of the valve hole 840 is slightly larger than the diameter of the valve body, so that the valve body 4 can just be smoothly inserted into the valve hole 840. After insertion, the working surface of the side wall of the valve body is basically in contact with the side wall of the valve hole, and the arc-shaped portion of the lower end of the valve body is basically in contact with the lower end of the inner wall of the outlet pipe. At the same time, the sealing member of the side wall of the working surface can realize the radial fixing of the valve body and the pipeline (valve hole). The mounting table 84a is circular as a whole, and only ordinary machine tools are needed. It can be machined without the need for a milling machine or a machining center, and the processing is convenient and low in cost. The cover plate 1 is fitted on the mounting table to fix the valve body. Specifically, a plurality of mounting holes are evenly distributed along the circumference of the edge of the mounting table 84a for mounting the cover plate 1. In order to reduce the overall volume and prevent its width from being greater than the outer diameter of the outlet pipe, four lugs are provided on the edge of the work surface, and mounting holes are provided on the lugs. A circular sealing ring mounting groove 841 is provided on the mounting table 84a, which is used to mount the second sealing member 3. The second sealing member 3 is located between the mounting table and the cover plate 1, and is used to achieve sealing between the mounting table and the cover plate 1, that is, end face sealing.Specifically, the second sealing member 3 includes a first annular sealing portion 31, which can be sleeved outside the annular protrusion 12. The end of the first sealing portion 31 extends radially outward to form a second sealing portion 32, which is located between the lower bottom surface of the cover plate 1 and the mounting table. In order to improve the sealing effect, one or more annular protrusions are provided on the top surface of the second sealing portion 32, and the annular protrusions form a sealing lip, that is, there are one or more sealing lips, which are coaxial with the cover plate to form a multi-pass seal; the end of the second sealing portion 32 is bent downward by 90 degrees to form a third sealing portion 33, the axial height of the third sealing portion 33 is less than the axial height of the first sealing portion 31, and it can be inserted into the sealing ring mounting groove 841, thereby realizing end face sealing. ;

[0092] In the present application, the meter case 83, the water inlet pipe 82, the water outlet pipe 84 and the vertical connecting pipe 81 are integrally formed by casting, so that the water meter shell forms an integral structure as a whole, which can greatly improve its structural strength, can withstand the shear force of the water meter pipe section and the water meter body, and can withstand the water pressure of the water network to avoid breakage. It is stable and reliable to use and has a long service life. At the same time, cast iron material can be used, which can greatly reduce production costs.

[0093] In order to avoid or reduce the amount of impurities in the water entering the valve body and user pipelines, in the present embodiment, a sedimentation chamber 832 is provided between the water inlet end of the valve body 4 and the inner wall of the pipeline. The sedimentation chamber 832 is located directly below the water inlet end of the valve body 4, which can cause impurities in the water flow of the pipeline to be deposited in the sedimentation chamber to achieve simple filtration; at the same time, impurities are prevented from entering the valve body and affecting the rotation and closing of the valve core. Specifically, a groove is provided on the side wall of the water inlet end of the valve body 4, which faces the water inlet direction to form a sedimentation groove 401. The sedimentation groove 401 is located at the lower end of the water inlet and is used to accommodate deposited impurities.

[0094] The detachable valve assembly of the utility model adopts a split splicing structure, which has low manufacturing cost and convenient assembly, can realize pre-installation of the valve, can be installed from the side wall of the pipeline, does not need to disassemble the pipe section, and has a simple assembly process, which greatly reduces the manufacturing, use and maintenance costs and has a wide range of applications; the valve body is spliced ​​by valve blocks, with high manufacturing precision, which is convenient for disassembly and assembly of the valve core, and reduces the production, assembly and maintenance costs; the valve block adopts up and down, left and right, and front and back settings, which can be configured according to different usage requirements, has strong adaptability and a wide range of applications; the sealing structure is optimized and designed, which is convenient to assemble and has good sealing performance; the water meter of the utility model adopts a detachable valve assembly, so that the meter case and the pipe section form an integral structure without a connection structure, which increases the overall strength of the shell assembly, avoids the risk of breakage or leakage at the joint, and at the same time When the valve body is assembled, the coating can be sprayed on the inner and outer surfaces of the case to improve corrosion resistance, and the case material can be made of low-cost, high-strength cast iron, which expands the limitation that the case or pipe section for assembling valve parts can only be made of high-cost copper, stainless steel or low-strength plastic. The coating can also reduce the accumulation of scale on the inner surface of the case, avoid the risk of valve jamming, and improve the overall reliability and stability of use. The valve assembly can be pre-assembled and then assembled with other parts to form a case assembly, which greatly improves the original complex assembly process, reduces production costs, and improves production efficiency. The detachable valve assembly and water meter of the utility model have a compact structure, low manufacturing cost, convenient and labor-saving assembly, greatly improve the overall structural strength of the pipeline, long service life, and low use and maintenance costs.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A detachable valve assembly, used for installation in a pipeline and controlling the flow of a flow channel in the pipeline, characterized in that: include: A valve body, serving as a fixing and mounting carrier, wherein the side wall and the lower end of the valve body are provided with a working surface, a valve cavity is formed in the valve body, and water ports are provided on both sides of the valve cavity, and the two water ports are respectively located on both sides of the working surface and serve as a water inlet and a water outlet; A first sealing member, mounted on the working surface and capable of being attached to the inner wall of the flow channel and achieving sealing; A valve core is rotatably mounted in the valve cavity and is used to control the amount of communication between the water inlet and the water outlet; A cover plate is mounted on the top of the valve body and is used to fix the valve body in the pipeline. The cover plate is provided with an axial hole through which a valve stem of a valve core can pass; A second sealing member, installed at the bottom of the cover plate, capable of contacting the side wall of the pipeline and achieving sealing; The valve body is formed by splicing valve blocks and can accommodate the valve core to be installed in the valve body.

2. The detachable valve assembly according to claim 1, characterized in that: The working surface and the first sealing member are U-shaped.

3. The detachable valve assembly according to claim 1, characterized in that: The working surface is provided with a sealing installation groove for installing the first sealing member.

4. The detachable valve assembly according to claim 1, characterized in that: The lower end of the cover plate is provided with a pressing portion for pressing the valve body and a limiting portion for radially limiting the valve body.

5. The detachable valve assembly according to claim 1, characterized in that: A boss is provided at the center of the upper surface and / or lower surface of the cover plate, the end surface of the boss is penetrated by a through hole to form the axial hole, and the lower end of the boss forms a first clamping surface and can contact the step surface of the valve stem side wall and axially limit it.

6. The detachable valve assembly according to claim 1, characterized in that: The lower surface of the cover plate is provided with an annular protrusion coaxial with the axial hole, the lower end of the annular protrusion forms a second pressing surface that can contact and press the top of the valve body, and the outer wall of the annular protrusion forms a seal installation surface for installing the second seal.

7. The detachable valve assembly according to claim 1, characterized in that: A water passage groove is provided on the side wall of the valve body or the first sealing member, and the water passage groove is used for allowing a small amount of domestic water to flow through when the valve core is closed.

8. The detachable valve assembly according to claim 1, wherein: The valve body is formed by splicing two valve blocks which are arranged left and right, front and back, or up and down.

9. A water meter, characterized in that: Use of the detachable valve assembly according to any one of claims 1 to 8.

10. The water meter according to claim 9, characterized in that: The water meter includes a case and an inlet pipe and an outlet pipe arranged on the side wall of the case, the ends of the inlet pipe and the outlet pipe are provided with vertical connecting pipes, the vertical connecting pipes are provided with an inlet channel and an outlet channel that are not connected to each other, the inlet channel is connected to the inlet pipe, and the outlet channel is connected to the outlet pipe; the side wall of the inlet pipe or the outlet pipe is provided with a mounting table, the mounting table is provided with a valve hole that is connected to the flow channel in the pipe and can accommodate the axial insertion of the valve body, and the edge of the mounting table is provided with a mounting hole for fixing the cover plate.

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